|Publication number||US8068183 B2|
|Application number||US 12/099,387|
|Publication date||Nov 29, 2011|
|Filing date||Apr 8, 2008|
|Priority date||Apr 8, 2008|
|Also published as||US20090254500|
|Publication number||099387, 12099387, US 8068183 B2, US 8068183B2, US-B2-8068183, US8068183 B2, US8068183B2|
|Original Assignee||Mitsubishi Electric Visual Solutions America, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (1), Classifications (6), Legal Events (3)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The invention relates to the field of consumer electronics systems and, more particularly, to apparatus, methods, and systems for centrally controlling the operation of devices within a network of consumer electronics systems and automatically detecting and configuring the control of an audio-video receiver coupled to the network.
The United States and other countries are quickly transitioning to digital television (DTV) to take advantage of high definition TV broadcasts. The US, in particular, is slowly moving away from and will ultimately abandon the analog television system. The use of an analog TV will eventually require the addition of set-top-box down-converters to change the digital broadcasts to the lower-performance analog format such TVs were designed to receive.
Digital systems and related standards, e.g., IEEE 1394, provide no way to control conventionally wired, IR signal controlled, analog audio-video (AV) devices (IRC devices), such as analog VCRs, DVD players, cable and satellite boxes, and AV receivers, and does nothing to eliminate the myriad of cables, connectors and remotes necessary to connect and control a mixed analog and digital home theater network system. The interconnection and control of such systems can be quite complex and unwieldy. For example, simply switching from a cable broadcast to playing a movie on a DVD player may involve numerous device specific remote controls and several iterations through the different layers of control on such remotes. Such a task may require the user to switch between video inputs on the TV, switch between layers on a universal TV remote control to power on and play the DVD player, and then, if the user has an AV receiver (AVR), switch between layers on the TV remote and shut down the audio output from the TV and switch to an AVR remote control to power up and output audio through the AVR or, if the AVR is the current audio output device, use the AVR remote control to switch between AVR inputs to output the DVD player's audio from the AVR. Completing such tasks is often fraught with frustration especially when the user is not immediately successful in being able to watch and listen to a movie being played on the DVD player.
The detection of an AVR coupled to the network and the initial set-up or programming of a device specific layer on a universal TV remote is also often fraught with frustration especially when the user is not immediately successful in being able to control the device.
Thus, it is desirous to be able to centrally and seamlessly control a variety of electronic devices over a variety of protocols from a single input device, provide an easy to use user interface (UI) wherein the complexities of the control of such devices is transparent to the user, and automatically detect and configure system control of an AVR coupled to the network.
The embodiments described herein are directed to novel apparatus, methods, and systems for centrally and uniformly controlling the operation of a variety of devices over a variety of protocols within a network system and, more particularly, a control system and uniform user interface for automatic device control configuring and centrally controlling these devices in a manner that appears seamless and transparent to the user. For example, in an entertainment system or a home theater network system (HTNS) comprising a mix of analog IR controlled (IRC) and digital 1394 audio-video (AV) devices, control and operation of the IRC and 1394 versions of an AV device appears the same to the user and the control of IRC devices can be automatically configured upon detection of their connection to the system.
In one embodiment, a primary display and control unit (PDCU), e.g., a television, of the HTNS will automatically presume the existence of an AVR coupled to an audio output port of the PDCU, and then automatically configure the control system to control the AVR. In the alternative, the PDCU will automatically sense or detect the existence of of an AVR coupled to an audio output port of the PDCU, and then automatically configure the control system to control the AVR. The PDCU preferably incorporates a switch, mechanical or the like, at the audio output port that changes states when an AV cable is coupled to the audio output port. The change in state of the switch is detected by the TV control module.
The user is prompted to identify the AVR device in the control system from a list of known devices. If the AVR is not included in the list, the control system is configured to learn input and function key control signal codes.
In another embodiment, a HTNS comprises a PDCU and a mix of IRC and 1394 AV devices and other inputs. The PDCU may comprise an AV system such as a television and, preferably, a digital television (DTV), having appropriate circuitry and programmable logic for operation of a preferred control system. Alternatively, the PDCU may comprise a primary display unit such as a TV or a “dumb” monitor or display, and a dedicated controller or computer housed in a separate chassis from the primary display unit and comprising appropriate programmable logic for operation of a control system. Preferably, the PDCU includes several I/O ports to which external or peripheral devices, such as the IRC and 1394 AV devices, may be coupled.
In another embodiment, the PDCU includes a context sensitive control system that enables centralized and seamless integrated control of both 1394 and IRC-type devices, as well as internal TV-type inputs and other input devices and system hardware interconnected to the PDCU. As such, the PDCU is the command center or hub of the HTNS or other network systems that may comprise, in addition to entertainment AV type devices, home appliances and home lighting, heating, air conditioning, security-type systems, and the like. The control system preferably includes a control module that is capable of interpreting an input command such as an event signal from a system remote, determining what action needs to take place, for example, navigate through menus on the screen of the PDCU or operate an attached AV device, determining what devices to connect and how to connect them, and then preparing and sending device appropriate messages or commands to the input devices. Preferably, for supported IRC devices, the control module includes a library of IR codes and is capable of translating an input command, such as a digital input command, into a message comprising IR codes from the IR code library appropriate for the device, and then blasting the command message to the IRC device to drive the IRC device. As noted above, the control system can also preferably learn the IR codes of a variety of IRC devices. All such operations, however, are advantageously transparent to the consumer or user.
In another embodiment, the control system includes a versatile icon based graphical user interface (UI) to provide a uniform, on-screen centralized control system for the network system. The UI enables the user to transparently control multiple input devices such as internal TV-type devices, AV devices, and other input devices over different protocols while operating on a single layer of a system remote control, e.g., the TV layer of a universal TV remote. For example, operation of an IRC DVD player and a 1394 DVD player appears identical to the user. The UI also advantageously provides on-screen, real time visual recognition of the state of the system, device availability, operation or connection options, active connections, navigation, and the like.
In operation, the user selects the “device” button on the remote, which causes the control system to display a device selection menu on the screen of the PDCU. The device selection menu preferably comprises a device window, a video window, an audio window, and, when a recording or other peer-to-peer connection is active, a connection window. The user next navigates through the device selection window and highlights a device icon, such as a VCR icon, to play a movie on the VCR. The user may move or jump to an audio selection window and highlight an AV receiver (AVR) icon for audio output from an AVR. Selection of the VCR and AVR from the device selection menu by pressing the “enter” or some other appropriate key on the system remote control while the corresponding icons are highlighted (selected), causes the control system to perform all necessary switching, make all necessary connections and display a transport menu on the screen of the PDCU. The transport menu is a device control menu preferably comprising device appropriate control function buttons such as “play”, “FF”, “RW”, and the like. Alternatively, device specific control menus, i.e., device supplied, may be displayable and operable through the control system. Lastly, the user selects the play button in the transport menu by pressing the “enter” or “play” buttons on the system remote control to play the movie. The steps taken by a user would be the same whether the device is an IRC or a 1394 device. As noted above, the control system interprets and acts on the user's selections, performing all necessary switching and making all necessary connections, in a manner that is transparent to the user.
A further embodiment includes a control system with connection permutation sensitivity. In particular, once a device such as the VCR is selected, the control system will automatically control it and the rest of HTNS based on stored device and device connection configuration data. For instance, if the VCR is connected to both an AVR and the PDCU, wherein the audio from VCR is to be outputted by the AVR while the video is outputted by the PDCU, upon selection of the VCR and AVR, the control system will automatically turn off the audio output from the PDCU and turn on the AVR to output the audio from the VCR when the VCR or switch inputs within the AVR if it is the current audio output or sink device. Thus, the control system handles all of the necessary switching transparently to the user. This situation dependent, context sensitive method tends to be superior to the “macro” command capability of some remotes because the control sequences of the control system are not dependent on the network devices being in a particular state at the beginning of the sequence. Further, this aspect of the control system enables seamless peer-to-peer communication and operation such as recording between devices even when the PDCU is not physically involved in the connection.
In yet another embodiment, the control system includes a configuration setup subsystem with automatic IRC device control configuration. It provides users with the capability to setup the configuration or device interconnections of the network system in a first time out of the box initial setup mode or the capability to change/modify/delete existing configurations in an edit mode. In the initial setup mode, the user is provided with a pre-set configuration of IRC device input connections on the PDCU and instructed to connect the IRC devices to the PDCU accordingly. The user then logs in each IRC device within the network system and the control system builds a device list and device connection database. If the network system includes IRC devices interconnected to the PDCU through other input connections, the user may enter the edit mode of the subsystem to customize the input connections of such devices as well as delete individual device or entire system configuration data. The navigation through the configuration setup subsystem is text and screen driven. In an alternative, navigation through the configuration setup subsystem may be by voice recognition or the configuration setup subsystem may be graphically driven.
If the command codes are not known for a connected IRC device or AVR, the configuration setup subsystem can automatically learn the control commands of the IRC device or AVR. During setup, the setup subsystem will display a message prompting the user to select the LEARN function and then display a message prompting the user to select an input or a function key for which the user wishes to learn the command. Once an input or function key is selected, the user is prompted to hold down the corresponding input or function key on the AVR remote until a visual indicator is provided that indicates the command code has been learned by the control system. As the input or function key on the AVR remote is depressed, the command signal from the AVR remote is detected by the IR detector of the PDCU, decoded and stored in memory. Once an IR code is found that can controls the input or function key of the AVR, the subsystem will provide a visual indication the command code has been learned by the control system.
Other aspects and features of the present invention will become apparent from consideration of the following description taken in conjunction with the accompanying drawings.
Referring in detail to the figures, novel apparatus, methods, and systems for centrally and uniformly controlling the operation of a variety of devices over a variety of protocols within a network system are described. In particular, a control system and user interface that provides uniform, seamless and transparent centralized control of a network of devices over a variety protocols are described. In one embodiment, a primary display and control unit (PDCU), e.g., a television, will automatically detect a audio-video receiver (AVR) couple to the network and learn the IR control commands of the AVR. More particularly, the PDCU preferably incorporates a switch, mechanical or the like, at the audio output port that changes states when an AV cable is coupled to the audio output port. The change in state of the switch is detected by the TV control module. Once the existence of an AVR is detected, the user is prompted to identify the device in the control system from a list of known devices. If the AVR is not included in the list, the control system is configured to learn the AVR input and function key command signal codes.
It will be understood by those skilled in the art that numerous configurations of a network system are possible. For example, a network system may comprise a mix of communication devices, consumer electronic systems, audio/video (A/V) devices, high and low speed devices, analog and digital devices, globally and locally controlled devices, and AV and non-AV devices, and the like, and may comprise both analog IR controlled and digital 1394 AV and other input-type devices. For exemplary purposes only, the apparatus, systems and methods will be described primarily in the context of a Home Theater Network System (HTNS).
In a preferred embodiment, a HTNS comprises a PDCU, which functions as the hub or command center of the HTNS, and a mix of IR controlled (analog) and 1394 (digital) AV devices, and other inputs. The AV devices and other inputs may be interconnected in a variety of ways to each other and to the PDCU. The PDCU preferably includes an integrated control system with a graphical user interface (UI) for making connections between components of the HTNS and controlling their operation. The control system provides the user with centralized control of all of the supported devices in the HTNS and, in an alternative embodiment, enables pass-through control of non-supported devices while avoiding signal jamming.
Preferably, the PDCU comprises an AV system such as a television and, more preferably, a digital television (DTV), comprising appropriate circuitry and programmable logic for operation of a control system. Alternatively, the PDCU may comprise a primary display unit such as a TV or a “dumb” monitor or display, and a dedicated controller or a computer housed in a separate chassis from the primary display unit and comprising appropriate programmable logic for operation of a control system. For exemplary purposes only, however, the description that follows is primarily directed to a DTV.
Preferably, the control system integrates IEEE 1394 and EIA-775 technology as well as the Home Audio Video Interoperability (HAVi) networking software technology and AV/C, which compliment IEEE 1394 technology. The control system also preferably incorporates a bi-directional 1394 bus interface, which is compliant with IEEE 1394-1995 and IEC 61883-1, exchanges MPEG-2 video with other devices in accordance with IEC 61883-4, at HD and SD resolutions as described in IEC61883-2, 3, 4, and exchanges digital audio as described in IEC 61883-6, which specifications are all incorporated herein by reference. The control system also preferably functions as a 1394 bus cycle master, as defined in IEEE 1394-1995 22.214.171.124, a bus manager, as defined in IEEE 1394-1995 126.96.36.199, and an isochronous resource manager, as defined in IEEE 1394-1995 188.8.131.52, provides higher-level 1394 interfaces to open cable and other AV/C devices as defined in EIA-775A, and conforms to Profile B of 775A subscriber devices, which specifications are all incorporated herein by reference. Although capable of being configured to do so, the control system will preferably not respond to any type of 1394 commands from other 1394 devices, in any protocol, and preferably does not conform to the HAVi Display Functional Module. The control system's Config ROM and SDD preferably identifies itself to other bus members that it does not support those sub-unit standards. In addition, the PDCU is preferably a full A/V device (FAV) as described in the HAVi 1.0 Specification, which specification is incorporated herein by reference.
The HTNS 10, as depicted, includes a plurality of IR controlled (IRC) devices 30, 1394 devices 40, including AV and others 1394 devices, and other inputs such as a PC 22, antennas 17 and the like, interconnected to the DTV 12 and one another. The 1394 devices 40 are preferably connected in series and/or in parallel to the DTV 12 across 1394 cable 49, while the IRC devices 30 are connected to the DTV 12 in parallel across conventional AV cables 31 and controlled in parallel across IR transmission (blaster) cables 38. The IR blaster cables 38 enable messages or commands comprising device specific IR codes to be communicated to the IRC devices 30. The DTV 12 preferably includes a library of device specific IR codes for supported devices and a control system that is capable of translating an input command (digital or analog) from the remote control 20 into a device appropriate message comprising device specific IR codes, which is then communicated to the IRC device 30 to control and operate or drive the IRC device 30.
As depicted, the IRC input devices 30 may include such devices as a cable box 18, a digital broadcast satellite tuner (DBS) 32, a video cassette recorder (VCR) 33, a digital video disk player (DVD) 34 and the like, connected to the DTV 12 across AV cable 31 such that the audio and video outputs, or, optionally, just video output, from these devices may be inputted to the DTV 12. The IRC input devices may also include such devices as a IRC AV receiver (AVR) 37 with audio output from the DTV 12 being directed to the AVR 37 across an AV cable 31. Although capable of outputting video to the DTV 12, the AVR 37 is preferably not configured to output video to the DTV 12. With an AVR 37 included in the HTNS 10, the DBS 32, VCR 33 and DVD 34, or other IRC AV devices 35 and 36, such as a second VCR, a DVD and the like, may be connected to the AVR 37 and the DTV 12 such that their video outputs are directed to the DTV 12 and their audio outputs are directed to the AVR 37. In the alternative, although not preferred, these devices may just be connected to the AVR 37 with both their audio and video outputs directed to the AVR 37.
As indicated above, the IRC devices 30 are controlled and operated across IR blaster cables 38. The IR blaster cables 38 preferably comprise an electrical cable with an IR emitter connected to one end and a mini-plug for connection to the DTV 12 on the other end of the cable. The IR emitter, which is preferably L-shaped, is preferably placed in front of or glued onto the IR detector of each IRC device 30 to communicate device specific IR code based messages to the IRC device 30. The IR emitter may include an opaque backing, which may block IR transmissions from other sources such as the remote. The blaster cable may, in the alternative, include a second mini-plug instead of an IR emitter for IRC devices 30 that have IR ports instead of or in addition to an IR detector.
As depicted, the 1394 devices 40 may include such devices as a digital VCR (D-VCR) 41, a digital camcorder 42, a digital DVD (D-DVD) 43, a digital AV (D-AV) disc player 44, a digital AVR (D-AVR) 45, a digital (D-) cable or satellite receiver 46, and the like, or other 1394 compatible systems or devices 47 and 48 such as home appliances and home lighting, heating, air conditioning and security-type systems, and the like. The 1394 devices 40 may include HAVi-type 1394 devices and may be interconnected to the DTV 12 and one another in series or parallel across 1394 cable 49.
As shown in
The device selection menu 52 preferably includes a device selection window (device window) 60, a video window 70, an audio selection window (audio window) 80, and, if a recording or other peer-to-peer connection is active, a connection window 90, which are preferably labeled “DEVICE”, “VIDEO”, “AUDIO” and “CONNECTION”, respectively. As depicted, the device window 60 is preferably located toward the bottom of the screen 11, while the video 70, audio 80, and connection 90 windows are preferably located toward the top of the screen with the video and connection windows 70 and 90 located toward the upper left corner and the audio window 80 toward the upper right corner. One of skill in the art would recognize that the device selection menu 52 may include any number of windows and is not limited to the device, video, audio and connection windows 60, 70, 80 and 90 discussed above or their orientation or location on the screen.
Icons corresponding to the IRC and 1394 input devices 30 and 40, such as a DBS tuner icon 61, an antenna icon 62, a VCR icon 63, a DVD icon 64, a generic IRC AV device icon 65, a D-VHS VCR icon 66, a D-cable or satellite receiver icon 67, a D-DVD icon 68, a D-AV disc icon 69, and the like are displayed in the device window 60 as AV source or input device options. An icon 72 corresponding to the TV video icon 72 is displayed in the video window 70. If other video sink or video output display devices are incorporated within the HTNS 10, icons corresponding thereto may preferably be displayed in the video window 70 or as part of a pull down menu. Icons corresponding to the audio sink or audio output devices, such as the TV audio icon 82, an IRC AVR icon 84 and a 1394 AVR icon 86, are displayed in the audio window 80. If a recording or other peer-to-peer connection is active, icons corresponding to the destination or sink devices, such as the VCR icon 92 as shown in
Incorporated within the UI 50 is an intuitive, on-screen, head-up, real-time visual recognition system. The visual recognition system preferably visually communicates to the user U the current system state including active “in-use” connections, input device options, audio output options, video destinations and output options, peer-to-peer connections, and navigation selections as the user U operates the controls on the remote 20 or control panel 16 and displays or navigates through the device selection menu 52. The visual recognition system may employ a variety of visual display indicators such as highlighting the exterior of the icon with light, different colors, different line types or the like, changing the icon color, fill pattern, or the like, graying or crossing out the icon, providing textual indicators, and the like, to visually indicate the system status, input and connection options, destinations, navigation, peer-to-peer connections and the like. In a preferred embodiment, the states or conditions of visual recognition include “disabled”, “current device” and “current menu selected icon” (or menu location), and more preferably: (1) current menu selected icon and current source or sink device (primary and secondary highlighting); (2) current menu selected icon and not current source or sink device (primary highlighting); (3) not current menu selected icon and current source or sink device (secondary highlighting); (4) not current menu selected icon and not current source or sink device (no highlighting); (5) not available or disabled (tertiary highlighting, e.g., grayed out). The icons themselves may be configured to convey additional information such as power state, channel, transport state or action (e.g., a dynamic motion icon indicating the device is playing), and the like.
As part of the device selection menu 1052, the icons are preferably displayed within a device selection window 1060 that includes a window label 1062 of “Device”, a video window 1070 that includes a window label 1071 of “Video”, an audio selection window 1080 that includes a window label 1081 of “Audio”, and, if a recording or other peer-to-peer connection is active, a connection window 1090 that includes a window label 1091 of “Connection”. The connection window 1090 may be displayable whenever there is an active recording or peer-to-peer connection, or only displayable whenever there is such a connection and the icon corresponding to the source device of the connection is the currently selected icon during navigation through the device selection window 1060; see the Ant A icon in device window 1060. A primary highlight 1065 and 1083 such as outlining an icon in a particular color, e.g., yellow, which in
As shown in
As shown diagrammatically in
The DM 110 advantageously enables centralized and seamless integrated control of the entire supported HTNS 10 including the DTV 12, its internal devices, both 1394 and IRC-type devices, as well as other inputs and system hardware interconnected to the DTV including 1394 compatible home appliances and lighting, heating, air conditioning and security-type systems, and the like. The DM 110 makes the entire operation and control of the supported devices within the HTNS 10 very user friendly. A user U can configure the control system 101 and, more particularly, the DM 110 with IRC device and device connection information and the user's preferences of 1394 devices within the HTNS 10. With this information, the DM 110 simplifies input switching and device operation for the user. For instance, the DM 110 and UI 50 will present the user with a list of choices to watch, the user U can select between these choices and rely on the DM 110 to do the necessary I/O port switching and device connecting.
With the DM 110 and UI 50, the user may advantageously operate all supported devices within the HTNS 10 with one remote control device on one layer, e.g., the TV layer of a universal remote control. The DM 110 and UI 50 will manage the details of communicating with external devices, whether IRC or 1394 devices, or a hybrid thereof. The DM 110 translates the commands from the remote as appropriate and issues commands in the language appropriate for the device being controlled, giving common, intuitive behavior across devices from within the HTNS 10. As a result, the user can use the same remote buttons to operate 1394 and IRC devices. While the remote control commands are being forwarded to external devices, the UI 50 may preferably display some on-screen indicator.
The DM 110 incorporates a translation function to translate incoming signals, such as a digital IR signal or the like, and a situation-dependent, context sensitive macro function. For example, in order to play a movie on a DVD with audio connected to an AV receiver input, the DM will switch (if necessary) the AV receiver's input and the DTV's input. The DM 110 will automatically switch audio to follow the video signal and do whatever other switching is necessary to output the DVD's audio. Further, the DM 110 may issue commands in the correct languages for the DVD and the AV receiver. The actions taken by the DM 110 are based on configuration information that the user has entered and on the current system state.
Following the user entered configuration of AV receiver inputs, the DM 110 may switch inputs automatically between analog and digital sources. For AV receiver models that require it, the DM 110 may send a command when necessary to switch an AV receiver input between analog and digital.
Referring in detail to
Preferably, the function of the AVCM 112 is to determine the current state of the HTNS 10 by querying the DMS 116, TVCM 140 and TV micro 105 as to devices connected to the system, active “in-use” device connections, active AV switching within devices and current TV operating parameters. For example, the AVCM 112 may determine from the DMS 116 that the active connections include an IRC cable box connected to the DTV, the video of an IRC VCR connected to the DTV and its audio connected to an AVR, and a D-DVD connected peer-to-peer to a D-VCR, from the TVCM 140 that the VCR's video is being directed to the main video of the DTV, the cable's video is being directed to the sub (PIP) video of the DTV and the device selection menu is currently displayed on the main video of the DTV, and from the TV micro 105 that the DTV's audio output is switched off. Once the system state is determined, the function of the AVCM 112 is to determine or interpret, based on the system state, whether an event signal is commanding a direct device action or a menu related action such as menu display, menu navigation or menu device action. If the event is a direct device action, the AVCM 112 instructs the DMS 116 and/or the TVCM 140 directly as to what device action is needed in a message that includes the current system state information. For example, if the video and audio of an Ant tuner were being output by the TV video and a receiver audio, respectively, and the user U pressed the “volume up” key on the remote control, the AVCM 112 would instruct the DMS 116 directly to raise the volume of the receiver audio. If the event is a menu-related action, the AVCM 112 communicates the event signal along with the current system-state information to the GUIM 114.
The GUIM 114 includes the UI 50 for the HTNS 10 and also the UI for the DTV 12, preferably expressible as graphical window objects. The function of the GUIM 114 is to determine or interpret whether the event requires the display of a menu or navigation within or between menus, or is a menu device action. If the event requires a device action, the GUIM 114 instructs the DMS 116 as to what device action is needed in a message that includes the current system state information. If the event requires menu display or navigation, the GUIM 114 instructs the TVCM 140 to display the menu in the main video 13 on the screen 11 of the DTV 12 with the current system state information. If the AV input signal being displayed in the main video 13 is an analog signal from an IRC device 30, the TVCM 140 generates a menu display signal, and then transmits the signal to the TV chassis and coordinates combining the input and menu display signals at the TV chassis of the DTV 12. In this instance, the menu appears opaque on the screen 11. If the AV input signal is a digital signal from a 1394 device 40, the menu display signal is combined with the input signal in the TVCM 140 and then transmitted to the TV chassis. In this instance, the menu preferably appears translucent on the screen 11.
The function of the DMS 116 is to determine based on current system state information and the device action instructions received from the AVCM 112 or GUIM 114, what devices to connect and operate, what device connections to break, how to accomplish the device connections and disconnects, and how to operate a particular device. As part of this function, the DMS 116 maintains, internal to the DMS 116, a device container list (DCL) 117 and a device interconnect list (DIL) 118.
The DCL is a list, or database, of all the supported devices that make up the HTNS 10, including internal TV devices such as tuners, I/O ports and the like, external input IRC and 1394 devices, and other input devices connected to the DTV 12. Information about each device is placed into a device container object (DCO), which is stored in persistent memory 106. The DCO consists of a variety of information common to all devices regardless of device type, including such information as a logical device ID to keep track of the device in the system and used to link device icons to the appropriate device DCO, a model number ID to identify which device model object (DMO) is associated with the device, and for IRC devices, identify an IR code file, and an indication of whether the device is a 1394 device or not, etc.
While DCOs for internal TV devices are created in advance and stored in persistent memory, DCOs for external input devices are created by the DMS 116 during configuration setup as the user logs in each IRC device or the configuration setup system discovers and identifies a 1394 device connected to the DTV 12. As part of creating the DCOs, the DMS 116 assigns each device a logical device ID and a DMO number to the device as part of the DCO and notes whether or not the device is a 1394 device.
Upon system initialization, i.e., after AC power is applied to the DTV 12, the DCOs stored in persistent memory are read from storage by the DMS 116, an appropriate DMO is created and appended to a particular DCO based on the model number ID information contained in the DCO, and the DCO/DMO is placed in the DCL 117. Because 1394 devices are considered by the control system to be unit devices comprising logical sub-unit devices (preferably, up to 32 sub-units), the DMS 116 creates both a unit level DCO/DMO and a sub-unit level DCO/DMO. Each DCO/DMO sub-unit is linked to a common unit level DCO/DMO that represents the device as a whole. For example, a 1394 device might consist of a Tuner and an AvDisc sub-unit. Each sub-unit has a DCO/DMO created for it and these two sub-units are linked to a DCO/DMO that represents the device as a whole. The sub-unit DCOs are not stored in persistent memory and are re-discovered each time the device is found on the 1394 network. As a result, when a 1394 device is discovered, the DMS 116 scans the DCL 117 for a DCO/DMO for that particular device. If the DCO/DMO is in the DCL 117, then only the sub-unit DCO/DMOs are created and attached to the unit level DCO/DMO in the DCL 117. If the DCO/DMO is not in the DCL 117, then the unit and sub-unit level DCO/DMOs are created with the unit level DCO/DMO added to the DCL 117 and unit level DCO added to persistent storage.
The DMOs, which are embedded in the DMS, include device-type specific information common for all VCR-type devices, DVD-type devices, etc. The DMS 116 creates and maintains each instance of a DMO that understands the details of connection and communication with a particular AV device, whether it is an internal TV device or an external device. The DMOs comprise a collection of device specific functions that know how to interface with the input device. The DMOs include details of the device's capabilities including, but not limited to, how to control the device, what functions the device can perform, which functions the device cannot perform, and all the I/O capabilities of the device. Remote commands, routed to the correct DMO, tell what the user wants to do to that device. The DMOs also preferably comprise information on how to interface with the appropriate control module corresponding to the device. The information contained in the DMOs is preferably defaulted for the IRC versions of each device-type. Some of the information, however, such as audio and video parameters like picture brightness, stereo/mono, and the like, may be user modifiable.
With the appropriate DMO appended to the DCO, the DCO/DMO contains information that is needed to control the device and support the UIM 111. Accordingly, the DCO/DMOs preferably comprise information such as a unique device identifier (logical device ID), a device model identifier (Model Number), a viewer's preferred name, a viewer's preferred icon ID, a device type (video/audio source, video/audio sink, video/audio record sink, or AV switch), AV pathway (analog, digital, both), digital pathway protocol, UI menu pathway, permanent, ignore and connected to bus flags, preferred audio settings, preferred video settings, preferred format setting, and the like.
The DIL 118 is a list, or database, of all the physical device connections in the HTNS 10. The DIL 118 contains all of the device connection ports and connection paths between the ports in the HTNS 10. To create a connection port, the I/O capabilities of a device are obtained from the DMOs. Each connection port is placed into a device interconnect object (DIO), which is stored in persistent memory. The information provided for a port by the DMO preferably includes port number, content—video, audio or both, direction—input, output, or recording input, and type—analog or digital. The DIL 118 also maintains the active “in use” connections between devices when an AV source is actively connected to an AV sink. Active connections can move along the physical connection paths and pass through AV switch devices. Preferably, the chassis of the DTV 12 is modeled as an AV switch device and the majority of AV connections pass through it. Active connections can come and go as the user changes AV sources and sinks, but physical connections always remain intact. The DMS 116 can establish active connections from a source to a sink even if the video and audio take different paths.
As part of the configuration system, 1394 devices are preferably automatically connected to a 1394 virtual switch DCO/DMO. The virtual switch has an unlimited number of I/O ports. Thus, when a DIO for a 1394 device is created, a DIO is created for the 1394 virtual switch and the connection information between the device and the virtual switch is established. Connections between the virtual switch and the device are considered by the DMS 116 to be physical connections.
The DMS 116 also maintains an IR Device list, an AVR Input Name list, and an AVR Input Default list. Upon system initiation, a list of all IRC devices is read from persistent storage and placed into the IR Device List. Each entry in the list contains several fields of information including, but not limited to, Device Type (VCR, DVD, etc.), Model Number (a unique number), Manufacturer Name, Manufacturer Model Name, IR Blasting Filename, and a set of special function flags. A list of AV Receiver input names is also read from persistent storage and placed into AVR Input Name List. Lastly, a list of AV Receiver default input settings is read from persistent storage and placed into a list called the AVR Input Defaults List. These defaults are used during the Initial setup configuration operation. There is also a collection of IR Code files that contain the actual IR Codes for each remote control device key that is supported for each device. There is one file for each device. The IR Code files are stored in persistent storage.
As part of the setup configuration system discussed below, the GUIM 114 uses the Manufacturer Names and Model Names from the IR Device list for presenting IRC devices to the user for selection when adding a new device. The AVR Input Name List is also used by the GUIM to present the AVR Input Names to the user in the Connection screen discussed below. When the Manufacturer and Model are selected, a uniquely identifiable Model Number is created for the device. When a DCO/DMO is created by the DMS 116 that will use the IRC module for communication, a message is sent to the IRC module 130 that associates a Model Number with an IR Code File. The IRC module 130 then loads the IR Code File data from persistent storage into memory (IR Code Library) for future use and associates the specified Model Number with that set of IR Codes. The Model Number and IR Blasting Filename is used by the DMS 116 to tell the IRC module 130 specifically what to blast when a command or message to blast is received by the IRC module. The message or command will include the Model Number and the Key Code to blast.
With the current system state and the required device action known, the DMS 116 accesses the DCL 117 and DIL 118 to retrieve specific information from the DCO/DMOs and DIOs necessary to make and break connections between devices, operate switching between I/O ports of an AV switch, operate specific devices and interface with appropriate control modules. From this information, the DMS 116 formulates instructions or messages that are communicated to the 1394, IRC and TV control modules 120, 130 and 140, and the TV micro 105 to accomplish the requested device action. All instructions or requests for operating the AV switches of the DTV 12 are sent via the TVCM 140 to the TV micro 105. The DMS 116 also modifies the DIL 118 to reflect the new active “in-use” device connections.
The function of the input device control modules 120, 130 and 140 is to transmit the commands or instructions from the DMS 116 to the chosen input device in a device appropriate manner. The DM 110, however, supports a wide variety of the 1394, IRC and internal TV AV devices—e.g., camcorders, DVD players, VCRs, and set-top boxes, audio decoder/amplifiers, antenna tuners, AV receivers and the like. To communicate and control a wide variety of 1394 devices, the 1394 control module 120 preferably maintains a device control module (DCM) 122 for each 1394 device within the HTNS 10. The DCMs 122 are software that takes the commands or instructions from the DMS 116 and transforms them to a device-specific message. Therefore, with DCMs 122 for every 1394 device, the DM 110 can pass remote commands such as change channels, PLAY, STOP and the like, to the DCM for that device and have the commands transmitted to the device in a device specific way via a 1394 driver 124. The 1394 driver provides appropriate interfacing between the 1394-control module 120 and external 1394 devices 126.
Preferably, the DM 110 provides embedded DCMs for common 1394 AV devices as part of the 1394 control module 120, is capable of hosting Java DCMs communicated from the 1394 devices themselves, and is capable of executing Java Havlets (retrievable from the Internet) that are associated with the DCMs of 1394 devices. The DM 110 also preferably supports device embedded DCMs through the 1394 control module 120. Embedded DCMs are controllers for a specific device written in a CPU-specific language (not Java.) A 1394 device may contain embedded DCMs to support certain other devices, typically IRC devices that it expects to see. Since an IRC AV device does not present a DCM of its own, some other device (a 1394 device) in the HTNS 10 must provide the DCM. Lastly, the DM 110 arbitrates with other HAVi FAVs/IAVs to distribute the load of DCMs to be hosted and, thus, the control of 1394 devices 40 within the HTNS 10.
To communicate and control a wide variety of IRC devices, the IRC module 130 transforms the commands or instructions from the DMS 116 into device appropriate messages comprising device specific IR code. The IRC module 130 maintains the IR code library or database 131. The IRC module 130 also includes a translation layer (transcoder) 133 that converts the commands or instructions to the correct IR code to be transmitted to the chosen external device 136. Based on the information from IR code library 131, which includes the modulation parameters (carrier frequency, duty cycle), and some representation of the ons and offs that represent the command, and DCO/DMOs in the DCL 117, the correct IR code for the device 136 in focus is synthesized. The transcoder 133 or communication handler then makes up a message or packet containing the IR code. The packet is then sent to a blaster micro controller 134 over a serial link via a blaster driver 132. The blaster controller 134 then transmits the packet or message via an IR blaster 135 to the external devices 136. The IR blaster 135 is preferably an IR emitter or repeater. The blaster controller 134 preferably sends messages in a manner required by the device as indicated by the DCO/DMO of the device. For example, some devices may expect two repetitions of the same message before responding. The blaster controller 134 may send the same command several times in succession if needed.
The TV control module 140 operates all of the TV hardware, i.e., the internal input devices 148, such as, for example, a digital tuner 142, a mpeg decoder 144, and an AC-3 decoder 146 and the like. The TVCM 140 manages the state of the signals on the screen, including which signal appears in the main and sub pictures and answers questions from the DMS 116 about what configurations are possible, e.g., what devices are available as PIP video sources. The TVCM 140 handles how a signal is displayed on the TV screen and how it sounds. This includes scaling, PIP/POP/Double-window, demux controlling, MPEG decoding, audio processing, NTSC video processing, and lip synch between audio and video decoders. Like the IRC and 1394 control modules 120 and 130, the TVCM 140 transforms the command or instructions from the DMS 116 into device appropriate messages to communicate with the internal input devices 148 of the HTNS 10.
As depicted in
The DM 110 preferably includes a configuration setup subsystem that advantageously provides high connection permutation sensitivity within the DM 110. With the configuration setup subsystem, users are able to setup the connection configuration of the HTNS 10 in a first time out of the box initial setup mode. In an edit mode, the setup subsystem enables the user to change, modify (i.e., customize) or delete existing configurations. In the initial setup mode, the user is provided with a pre-set configuration of IRC device input connections on the DTV 12 and instructed to connect the IRC devices 140 to the DTV 12 accordingly.
In order to build the DCL 117 and DIL 118, and the DCO/DMOs and DIOs corresponding to the IRC devices 40 of the HTNS 10, a “device” entry menu 200 and 200′ (see
Once all the IRC devices are logged in, a “review” menu 220 (see
To complete or edit the setup configuration, the user selects the “next” key in the review menu 220 to present a “finish” menu 226. (see
This procedure may be used to identify a “hybrid” 1394 device within the HTNS 10 and configure the hybrid 1394 device to operate as such within the DM 110. A hybrid 1394 device is a device capable of receiving analog and digital input and/or producing analog and digital output.
During setup (initial or edit), if “other” is selected for the manufacturer, an option to learn IR or other control codes of a device may be presented. A learning screen is presented that provides a list of buttons on a remote control device that can be supported and learned. After a button on the screen is activated (by a pressing of enter (or select) on the remote), the DM 110 is in learning mode awaiting IR code. The remote for the IRC device for which the codes are being learned is then pointed at the DTV 12, and the designated key pressed to allow capture of the IR code. A change in the appearance of the soft key (e.g., an addition of a checkmark) indicates which keys have been successfully added to IR code library. The learned IR codes are added to a newly created DCO/DMO for the device being added. The DCO/DMO behaves the same as those already in the DMS 116. When a device is added it is integrated with the already supported devices and will show up in the Manufacturer/Model screen just like the already supported devices during setup configuration. An entry in a learned devices database may be added as well and stored in persistent storage.
In a plug-and-play mode 300 depicted in
Whether in the initial out of the box set up mode, wherein the existence of an AVR may be presumed, or the plug-and-play mode depicted in
At step 314, the user is prompted to enter “Other” if the AVR device manufacturer or model is not included in an AVR list. If “Other” is selected for the manufacturer, an option 406 to “Learn” IR or other control codes of the AVR is presented in AVR configuration menu 400. If the Learn option 406 is selected at step 316, an AVR inputs menu 401 is presented to the user at step 318 prompting the use to input the number of AVR inputs 408 being utilized. At step 318, an input learning screen 402 is presented to the user that provides a list of AVR input buttons on an AVR remote control device that can be supported and learned. After an input button 410 on the learning screen 402 is activated (by a pressing of enter (or select) on the TV remote), the DM 110, at step 322, is placed in learning mode awaiting receipt of an IR code. The remote for the AVR is then pointed at the DTV 12, and the designated input key pressed to allow capture of the IR code. A change in the appearance of the soft key 412 (e.g., an addition of a checkmark) indicates which keys have been successfully added to IR code library.
Similarly, at step 324, a AVR function key learning screen 403 is presented to the user that provides a list of AVR function buttons on an AVR remote control device that can be supported and learned, e.g., power on, power off, volume up, volume down, mute, analog to digital and digital to analog. After a function key button 414 on the learning screen 403 is activated (by a pressing of enter (or select) on the TV remote), the DM 110, at step 326, is again placed in learning mode awaiting receipt of an IR code. The remote for the AVR is then pointed at the DTV 12, and the designated function key pressed to allow capture of the IR code. A change in the appearance of the soft key 416 (e.g., an addition of a checkmark) indicates which keys have been successfully added to IR code library.
The learned IR codes are added to a newly created DCO/DMO for the AVR. The DCO/DMO behaves the same as those already in the DMS 116. When a device is added it is integrated with the already supported devices and will show up in the Manufacturer/Model screen just like the already supported devices during setup configuration. An entry in a learned devices database may be added as well and stored in persistent storage.
In operation, referring to
With the device selection menu 52 displayed, as shown in
Referring to the video window 70 in
The user U may then depress the left arrow of the adjust button 29 on the remote 20 to navigate within the device window 60 of the device selection menu 52 to the adjacent icon 65 corresponding to a IRC AV device 35. As before, this event signal is received and amplified by the detector 103, decoded by the TV micro 105 and transmitted to the UIM 111 of the DM 110. The AVCM 112 determines the current system state and, based on such information, that the event is a menu-related event. The AVCM 112 transmits the event and the system state information to the GUIM 114. The GUIM 114 determines, based on the current system state information, that the event is a menu navigation event and transmits a message to the TVCM 140 to navigate to the next icon within the device window 60, transmits this information to the AVCM 112 and queries the AVCM 112 as to the corresponding system state, transmits the system state information to the TVCM 140 and instructs the TVCM 140 to display the current system state information and device options within the device selection menu 52.
In the device window 60, as shown in
In the audio window 80, the bold outline about TV audio icon 82 indicates that it is the currently selected device icon for navigation within the audio window 80 and is available for an audio connection with the IRC AV device 35. The AVR icon 84, which is not bold outlined, indicates that the IRC AV receiver 37 is available as an audio sink for the audio signal of the IRC AV device 35, but is not the currently selected icon for navigation within the audio window 80. The D-AVR icon 86 includes cross hatching to indicate that it is the current audio sink for the audio signal from the D-VHS VCR 41. The D-AVR icon 86 is also grayed out to indicate that the D-AV receiver 44 is unavailable as an audio sink for the audio signal from the IRC AV device 35.
The user U may again depress the left arrow of the adjust button 29 on the remote 20 to navigate within the device window 60 of the device selection menu 52 to the adjacent DVD icon 64 corresponding to the IRC DVD player 34. Again, this event signal is received and amplified by the detector 103, decoded by the TV micro 105 and transmitted to the UIM 111 of the DM 110. The AVCM 112 determines the current system state and, based on such information, that the event is a menu-related event. The AVCM 112 transmits the event and the system state information to the GUIM 114. The GUIM 114 determines, based on the current system state information, that the event is a menu navigate event and transmits a message to the TVCM 140 to navigate to the next icon within the device window 60, transmits this information to the AVCM 112 and queries the AVCM 112 as to the corresponding system state, transmits the system state information to the TVCM 140 and instructs the TVCM 140 to display the current system state information and device options within the device selection menu 52.
In the device window 60, as shown in
In the audio window 80, the bold outline about the AVR icon 84 indicates that it is the currently selected device icon for navigation within the audio window and is available as an audio sink for the audio signal from the IRC DVD player 34. The TV audio icon 82, which is not bold outlined, indicates that the TV audio 15 of the DTV 12 is available as an audio sink for the audio signal from the IRC DVD player 34, and that the TV audio icon is not currently selected for navigation within the audio window 80. The D-AVR icon 86 includes cross hatching to indicate that it is the current audio sink for the audio signal from the D-VHS VCR 41. The D-AVR icon 86 is also grayed out to indicate that the D-AV receiver 44 is unavailable as an audio sink for the audio signal from the IRC DVD player 34. Alternatively, the D-AVR icon 86 may be grayed out with no cross-hatching when the device is unavailable as an audio sink.
Next, the user U may press the enter (or select) button 22 or some other appropriate key on the remote to select the current selections (highlighted devices) within the device selection menu 52. If the current selected icon corresponded to a 1394 device, a pop-up menu (not shown) would be presented providing the user with sub-unit options to choose from. The adjust button could be used to navigate between the sub-unit choices and the enter (or select) key could be used to select the desired sub-unit.
As before, this event signal is received and amplified by the detector 103, decoded by the TV micro 105 and transmitted to the UIM 111 of the DM 110. The AVCM 112 determines the current system state and that the event is a menu related event. The AVCM 112 transmits the event and the system state information to the GUIM 114. The GUIM 114 determines, based on the current system state information, that the event is a menu device action and transmits a message or command to the DMS 116 containing the current system state information and instructing the DMS 116 that the DVD player 34 has been selected as the input device, that the TV video 13 of the DTV is the video output device, and that the IRC AV receiver 37 has been selected as the audio output device. Based on the current system state information and device command, the DMS 116 queries the DCL 117 and DIL 118 for connection, I/O port, operation information and the like contained in the DCO/DMOs and DIOs, and then formulates an appropriate message, which it transmits to the TVCM 140 instructing the TVCM 140 to have the TV micro 105 switch the video input port from the port for D-VHS VCR 41, i.e., the 1394 port, to the port to which the IRC DVD player 34 is connected. The DMS 116 also formulates an appropriate message that it transmits to the 1394 control module 120 instructing it to stop or shut down the D-VHS VCR 41 and D-AVR 44. The 1394 control module 120 calls up the appropriate DCMs 122, which translate the instructions into device specific messages that the 1394 driver transmits to the D-VHS VCR 41 and D-AVR 44 to stop or shut down the devices. The DMS 116 also formulates appropriate messages that it transmits to the IRC module 130 instructing it to operate the DVD 34 and the IRC AV receiver 37 and to perform the appropriate switching within the DVD and the AVR to enable an audio connection there between. The IRC module 130 accesses the IR code library 131 and formulates messages corresponding to the commands from the DMS 116 that contain device specific IR code for the chosen devices. The messages or packets are then transmitted serially to the IR blaster controller 134 via the blaster driver 132. The IR blaster controller 134 controls the transmission of the packets to the DVD player 34 and the AVR 37 via an IR Blaster 135 (emitter/repeater) and in accordance with the DCO/DMOs of the chosen devices.
At the same time the DMS 116 is seamlessly handling the switching and connection of the devices, the GUIM 114 is instructing the TVCM 140 to bring up the transport menu 54. The transport menu 54 provides the user U with a familiar set of control function buttons for operating external devices through the control system and interacts with the UI 50 and DM 110. The transport menu 54 includes a list of six icons corresponding to standard commands of “Rewind”, “Play”, “Forward”, “Stop”, “Pause”, and “Record”. The transport menu 54 may also be displayed when an external device is active and any of the keys corresponding to these standard commands is pressed on the remote 20. As depicted in
For IRC devices, the DM 110 preferably incorporates the display and operation of device specific control menus generated by the IRC device. The DM 110 preferably maps the display of such menus to the “menu” key on the remote. For 1394 devices, the DM 110 preferably incorporates “on-screen display” (OSD) controllers for displaying OSDs from external 1394 devices that provide them. The OSDs from these devices give access to unique features of those devices that are not part of the normal controls. For example, pressing the PLAY button will cause an AV/C D-VCR to begin playing. But the user can still access unusual features, such as a sophisticated “cueing by GOP” by accessing that AV/C D-VCR's menus. The DM 110 preferably incorporates ways to include the UI's of external devices as though they were extensions of its own. To do this, the DM 110 preferably incorporates AV/C Panel Controller functionality, HAVi DDI interface, and EIA-775A bitmap interface, a HAVi level-2 UI (havlet), and the like.
With the play button of the transport menu 54 highlighted, the user U may hit the enter (or select) key 22 or the play button on the remote 20 to begin playing the DVD player 34. As before, this event signal is received and amplified by the detector 103, decoded by the TV micro 105, and then transmitted to the UIM 111 of the DM 110. The AVCM 112 determines the current system state and that the event is a menu related event. The AVCM 112 transmits the event and the system state information to the GUIM 114. The GUIM 114 determines, based on the current system state information, that the event is a menu device action and transmits a message or command to the DMS 116 containing the current system state information and instructing the DMS 116 to have the DVD player 34 begin playing. Based on the current system state information and device command, “play”, the DMS 116 formulates an appropriate message that it transmits to the IRC module 130 instructing to have the DVD 34 begin playing. The IRC module 130 accesses the IR code library and formulates a message corresponding to the play command from the DMS 116 that contains device specific IR code. The message or packet is then transmitted serially to the IR blaster controller 134 via blaster driver 132. The IR blaster controller 134 controls the transmission of the packet to the DVD player 34 via the IR blaster 135. The DVD player 34 begins to play with its video outputted on the main picture 13 of the screen 11 of the DTV 12 and its audio outputted from the IRC AV receiver 37. While the DM 100 is performing all the noted operations, the GUIM 114 may instruct the TVCM 140 to display a visual indicator that such activity is occurring.
For PIP operation, the user U may depress the PIP device key 27 on the remote 20 to display the PIP device selection menu 152, which, as depicted in
The sub-picture icon 172 corresponds to the PIP or sub picture 14 of the screen 11 of the DTV 12. The DM 110 acts to display the PIP device selection menu 152, and responds to navigation and device action commands in the same manner as discussed above in regard to the device selection menu 52. The GUIM 114, in coordination with the TVCM 140, indicates in the PIP device window 160 which input devices are available as a source device for the PIP video by graying out icons of those devices that are not available. For example, all icons corresponding to 1394 devices may be grayed out if the video signal to the main picture 13 is an analog signal.
For recording or other peer-to-peer connection operation, the user U may press the RECORD and Connect buttons 25 and 23 on the remote 20. In response, the DM 110 displays a Record/Connect menu 250 on the screen 11 of the DTV 12 wherein the current device is the source device. (see
The recording and other peer-to-peer connections may be over physical connections that include the DTV 12 or over physical connections, that do not include the DTV 12, such as, for example, the playing of a movie from a D-DVD 1394 device on an auxiliary 1394 video display device. As with other operations, the DM 110 receives the record or connect event signal and translates it to perform the necessary switching, make the necessary connections, and operate the chosen devices, all transparently to the user U.
The control system 101 preferably synchronizes its blasting of IR messages to supported IRC devices with the messages coming from the remote 20, to blast during gaps between remote messages and thus avoid IR “jamming”, as described in U.S. patent application Ser. No. 09/535,263 for “Protocol For Avoiding Interference Between Transmission Devices,” which is incorporated by reference. IR jamming occurs when an external device cannot decode the commands blasted to it because the remote 20 is transmitting at the same time. The software on the remote 20 is preferably adapted to leave gaps during which the DM 110 can blast messages to other devices. The DM 110 preferably coordinates its IR transmissions with these gaps. The blaster 135 preferably has a means for communicating its busy/completion status to the DM 110.
After a user command from the IR remote 20 or the front panel 16 starts an operation, if preferred that operation may not be interrupted with another user command, with the exception of certain desirable cases. Also if preferred, user commands ignored because of any operation already in-progress may be discarded and not buffered for future use.
While the invention is susceptible to various modifications and alternative forms, a specific example thereof has been shown in the drawings and is herein described in detail. It should be understood, however, that the invention is not to be limited to the particular form disclosed, but to the contrary, the invention is to cover all modifications, equivalents, and alternatives falling within the spirit of the appended claims.
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|May 29, 2008||AS||Assignment|
Owner name: MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC., CALI
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STECYK, POLLY;REEL/FRAME:021013/0652
Effective date: 20080506
|Jun 7, 2011||AS||Assignment|
Owner name: MITSUBISHI ELECTRIC VISUAL SOLUTIONS AMERICA, INC.
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC;REEL/FRAME:026413/0494
Effective date: 20110531
|Jul 10, 2015||REMI||Maintenance fee reminder mailed|